340212440 has 32 divisors (see below), whose sum is σ = 773066160. Its totient is φ = 134736000.

The previous prime is 340212413. The next prime is 340212469. The reversal of 340212440 is 44212043.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38066 + ... + 46145.

Almost surely, 2^340212440 is an apocalyptic number.

It is an amenable number.

340212440 is an abundant number, since it is smaller than the sum of its proper divisors (432853720).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

340212440 is a wasteful number, since it uses less digits than its factorization.

340212440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84323 (or 84319 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 340212440 is about 18444.8486033364. The cubic root of 340212440 is about 698.0985402870.

Adding to 340212440 its reverse (44212043), we get a palindrome (384424483).

The spelling of 340212440 in words is "three hundred forty million, two hundred twelve thousand, four hundred forty".